醚化汽油单烃的组成及含氧化合物的测定

采用ＯＶ－１弹性石英毛细管柱分析了催化裂化汽油及其醚化后汽油,可测定醚化汽油中单烃组成及含氧化合物的含量、单烯烃转化率,弥补了红外法测定醚化汽油中含氧化合物的不足,为工艺条件和催化剂的选择及改进、反应机理的研究提供了重要的基础数据。同时发现此催化裂化汽油中含微量甲基叔丁基醚,对其来源应深入探讨。     

Fabrication of crystalline selenium microwire

A method of fabricating selenium(Se) microwire is demonstrated.A multimaterial fiber with amorphous selenium(a-Se) core and multicomponent phosphate glass cladding is drawn by using a conventional optical fiber drawing technique.Then the a-Se core of the fiber is crystallized by a post thermal process at 150 ℃.After the multicomponent phosphate glass cladding is stripped from the multimaterial fiber by marinating the fiber in HF acid solution,a crystalline selenium(c-Se)microwire with high uniformity and smooth surface is obtained.Based on microstructure measurements,the c-Se microwire is identified to consist of most hexagonal state particles and very few trigonal state whiskers.The good photoconduction property of c-Se microwire with high quality and longer continuous length makes it possible to apply to functional devices and arrays.